Daniel, I actually meant punctures of the air springs, which in your installation seem quite unprotected, but I guess that answers the question eloquently thank you.
Well, the casting for the coupler arrived on Friday afternoon.
By yesterday morning the machining was complete and the trailer was trundling around in the park in front of my house. This park is almost a pedestrian thoroughfare, and lots of people ride quad bikes, scramblers and 4x4's on it. It seems to get a lot of use as a driver training venue over the weekends as well. The result is that there are some reasonably good ruts in places, which were taken cross-wise at reasonable speed.
So far, so good, although I have identified a couple of small issues. The rub is of course that, despite filling the water tanks, the trailer is still very light.
Tomorrow evening it is being delivered to a specialist hose supplier for brake pipes.
Mag ons ons kenniskry met lekkerkry aanhoukry.